:root{--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--bg-primary:#f8fafc;--bg-card:#fff;--text-main:#0f172a;--text-muted:#64748b;--border-color:#e2e8f0;--primary-color:#2563eb;--primary-hover:#1d4ed8;--radius-sm:4px;--radius-md:6px;--radius-lg:8px}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-main);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}